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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [time/] [sleep.go] - Blame information for rev 858

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1 747 jeremybenn 
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package time
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// Sleep pauses the current goroutine for the duration d.
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func Sleep(d Duration)
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func nano() int64 {
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        sec, nsec := now()
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        return sec*1e9 + int64(nsec)
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}
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// Interface to timers implemented in package runtime.
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// Must be in sync with ../runtime/runtime.h:/^struct.Timer$
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type runtimeTimer struct {
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        i      int32
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        when   int64
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        period int64
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        f      func(int64, interface{})
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        arg    interface{}
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}
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func startTimer(*runtimeTimer)
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func stopTimer(*runtimeTimer) bool
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// The Timer type represents a single event.
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// When the Timer expires, the current time will be sent on C,
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// unless the Timer was created by AfterFunc.
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type Timer struct {
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        C <-chan Time
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        r runtimeTimer
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}
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// Stop prevents the Timer from firing.
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// It returns true if the call stops the timer, false if the timer has already
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// expired or stopped.
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func (t *Timer) Stop() (ok bool) {
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        return stopTimer(&t.r)
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}
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// NewTimer creates a new Timer that will send
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// the current time on its channel after at least duration d.
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func NewTimer(d Duration) *Timer {
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        c := make(chan Time, 1)
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        t := &Timer{
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                C: c,
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                r: runtimeTimer{
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                        when: nano() + int64(d),
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                        f:    sendTime,
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                        arg:  c,
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                },
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        }
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        startTimer(&t.r)
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        return t
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}
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func sendTime(now int64, c interface{}) {
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        // Non-blocking send of time on c.
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        // Used in NewTimer, it cannot block anyway (buffer).
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        // Used in NewTicker, dropping sends on the floor is
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        // the desired behavior when the reader gets behind,
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        // because the sends are periodic.
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        select {
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        case c.(chan Time) <- Unix(0, now):
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        default:
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        }
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}
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// After waits for the duration to elapse and then sends the current time
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// on the returned channel.
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// It is equivalent to NewTimer(d).C.
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func After(d Duration) <-chan Time {
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        return NewTimer(d).C
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}
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// AfterFunc waits for the duration to elapse and then calls f
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// in its own goroutine. It returns a Timer that can
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// be used to cancel the call using its Stop method.
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func AfterFunc(d Duration, f func()) *Timer {
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        t := &Timer{
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                r: runtimeTimer{
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                        when: nano() + int64(d),
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                        f:    goFunc,
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                        arg:  f,
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                },
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        }
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        startTimer(&t.r)
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        return t
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}
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func goFunc(now int64, arg interface{}) {
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        go arg.(func())()
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}

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